我相信这是 Eloquent 事件（http://laravel.com/docs/eloquent#model-
events）的完美用例。您可以使用“删除”事件进行清理：

class User extends Eloquent
{
    public function photos()
    {
        return $this->has_many('Photo');
    }

    // this is a recommended way to declare event handlers
    public static function boot() {
        parent::boot();

        static::deleting(function($user) { // before delete() method call this
             $user->photos()->delete();
             // do the rest of the cleanup...
        });
    }
}

您可能还应该将整个事物放入事务中，以确保引用完整性..